Query on DNS Bind cache setting

[Sabat Gangadhar]

Hi All,

         In DNS bind, two clean the cache, 2 types of cache setting are
there. One is at zone level by default 24hr, and another at server level
such as max-cache-ttl, max-ncache-ttl and cleaning-interval.
Which level setting is effective if both options are set?
Thanks in advance.

Regards,
Gangadhar